Improvement in pulp-engines



S. L. GOULD. Pulp-Engine.

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a lay/MN l I Il', /lIIIIlIIlliI/lllll N, PETERS. PHUTO-LITHGGHAFHER,WASHINGTON. D C

' Patented Nov. 6, 1877.

UNITED STATES PATENT OFFICE! srMEONL. Go1ULD,.oF GA'RDINER, MAiNnf y ISpecification forming part of Letters Patent No. 196,751, dated November6, 1877; application filed 'I August 13,1877, n

To all whom 'it may concern: 'y

Be it known that I,jSnvLEoN L. GoULD, of

In the said drawings, A represents the curb or case of Vmy engine, thesame being in the form' of a horizontal cylinder with closed ends and aflattened top, such top havinga chute or hopper, A', by means of whichrags or-other vmaterial are int'roducedinto the interior of the case.

L The portion of my engine for disintegrating and reducing the stockwhich is to be converted into pulp consists of a vertical, stationary,annular grinding-bed, and a rotary grinding wheel or disk operating inconnection therewith, the contiguous faces of the two being armed withsuitable radial blades or knives, between which the stock is reduced.

The stationary annular bed is shown at B as a substantial ring ofcast-iron, secured at opposite sides to the interior of the case A, asshown at C O, and arrangedvertically and at right angles to the axis ofthe said case, one side of the said annular bed B being armed gith aseries of radial knives orblades, cpa,

This ring B, I prefer to cast hollow, as shown in the drawings, andconnect with its interior a feed and discharge pipe, b c', by means ofwhich a current of cold water may be per# .mitted to iiow through it.The purpose of .thus reducing the temperature ofthe bed B, andconsequently ofthe stuff 7 within the case A, is to avoid injury to thesizing employed in sizing the pulp, as a high temperature interfereswith a proper action of such sizing. l

The rotary grinding-wheel is shown at D as a solid disk of cast-iron,disposed alongside of the bed B, and `of about equal diameter therewith,and secured to a long horizontal shaft, E, which extends through thebore of the bed B, and finds a bearing, b, at each end of the case A,the face of nthe disk D next ador hopper A.

jacent to the ring-bed B being armed with a series of radial blades, cc,&c., which operate.

in connection withthe blades a, to reduce rags or other materialsubjected to their action, power being applied to the said shaft in' theordi-l Ilary Illa/H1161.

As the grinding head or-diskfD mustbe forcedY 'ofthe shaft, (shown at din the accompanyingv drawings,) I surround it with a box, F,`and I fillthis box with water, a conical step or pivot, e, being securedto theinside of such box, and entering a corresponding socket in the end ofthe shaft. y

As the water in the box F surrounds the end of the shaft and the step,the heat which would otherwise result from the friction of the parts isobviated, and the use of lubricants avoided, as the water constitutes aneffective lubricant.

The water-box F .is supported within a bracket, G, extending from theend of the case A, and a feed-screw, H, operated by suitable means, isscrewed through vthe outer end or head f of such bracket, by means ofwhich the rotary disk D is fed up to the annular bed B with any desireddegree of power.

The stock to be ground or reduced in this engine is introduced, with theproper amount y of water, into the case A through the opening generate acentrifugal force, which induces a current and circulation of the stockthrough the centerof the annular bed B, and outward between such bed andthe disk, and is discharged at the circumference of the two, the bladesa and c serving to disintegrate andreduce such stock as it passesbetween them. This continuous circulation and grinding of the stock isallowed to continue until it is reduced to pulp of the desiredconsistency or neness, when the contents of the engine are dischargedthrough a trap in the bottom, in the ordinary manner.

.The water-box, as explained, obviates any danger'of undue heating ofthe end of the The revolutions of the disk D y shaft and-its step, anddoes away with the 1aborand expense of lubricating it.

The annular or open, as well as hollow, form of the grinding-bed Benables it and its knives to remain in a comparatively cool condition,which isa very desirable result.

Owing to the absence of arms in the grinding-bed B and disk D, and otherobstructions in the case A, little resistance is offered to the iow orcirculation of stock, for which reason the reducing process takes placerapidly, and less power is required to drive the engine, while, stillfurther, no dead stock,7 as it is termed, is allowed to stand in thecase. A

Owing to the contiguous faces of the bed B and 'disk D, and theirarmature being ilat, any pieces of iron or other hard foreign substancesY which may find their way to the interior of the case in the stock donot become entangled in and break the knives, but are readilyprecipitated to the bottom ofthe case, from whence they may be removedthrough a suitable trap.

For the saine reason-that is, the straight edges of the knives-I obtainalarge workingsurface, which, acting in a direct manner upon the stock,pulls and separates, rather than chops up, the fibers of the material.

I claim-fl. In paper-pulp engines, the annular stationary grindingbed Band rotary disk, in combination with the case or curb A, when thecontiguous faces of the two are at, and the whole so arranged that thestuff in circula-4 tion takes a course through the center of the bed B,passes between the latter and the disk D, and is discharged at thecircumference of the two, the said bed being secured to the walls of thecase, as stated, and the disk supported upon a shaft which passesthrough the bed, the whole being arranged and operating substantially asand for purposes stated.

2. In paper-pulp engines, the combination,l ywith the curb or case, andthe shaft extendbox F, the whole being substantially as and for purposesstated.

4. rlhe hollow annular grinding-bed provided with water inlet and outletports, substantially as and for purposes stated.

SIMEON L. GOULD.

Witnesses F. CURTIS, W. E. BOARDMAN.

